[1]刘 浪,朱 超,陈国龙,等.微观尺度下含硫尾砂胶结充填体侵蚀机理[J].西安科技大学学报,2018,(04):553-561.[doi:10.13800/j.cnki.xakjdxxb.2018.0406 ]
 LIU Lang,ZHU Chao,CHEN Guo-long,et al.Erosion mechanism of sulfur-bearingtailings in micro-scale[J].Journal of Xi'an University of Science and Technology,2018,(04):553-561.[doi:10.13800/j.cnki.xakjdxxb.2018.0406 ]
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微观尺度下含硫尾砂胶结充填体侵蚀机理(/HTML)
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西安科技大学学报[ISSN:1672-9315/CN:61-1434/N]

卷:
期数:
2018年04期
页码:
553-561
栏目:
出版日期:
2018-07-15

文章信息/Info

Title:
Erosion mechanism of sulfur-bearingtailings in micro-scale
文章编号:
1672-9315(2018)04-0553-09
作者:
刘 浪12朱 超12陈国龙3辛 杰12方治余12
1.西安科技大学 能源学院 陕西 西安 710054; 2.西安科技大学 西部矿井开采及灾害防治教育部重点实验室,陕西 西安 710054; 3.陕西省汉中公路管理局,陕西 汉中 723000
Author(s):
LIU Lang12ZHU Chao12CHEN Guo-long3XIN Jie12FANG Zhi-yu12
(1.College of Energy Science and Engineering,Xi'an University of Science and Technology,Xi'an 710054,China; 2.Key Laboratory of Western Mine Exploitation and Hazard Prevention,Ministry of Education,Xi'an University of Science and Technology,Xi'an 710054,China; 3.Hanzhong Highway Bureau of Shaanxi Province,Hanzhong 723000,China)
关键词:
含硫尾砂 胶结充填体 水化单元 微观结构 侵蚀过程
Keywords:
sulfur-containing tailings cemented backfill hydration unit micro structure erosion process
分类号:
TD 823
DOI:
10.13800/j.cnki.xakjdxxb.2018.0406
文献标志码:
A
摘要:
全尾砂作为采空区充填最常用的充填骨料之一,以其形成的胶结充填体必然含有一定量的硫化物或硫元素。针对硫元素对胶结充填体强度的影响问题,基于水泥水化单元模型及水泥的微观水化反应机理,建立了二维的含硫尾砂侵蚀水化单元模型。在此基础上,通过分析石膏与钙矾石在侵蚀过程中的作用,研究了硫酸根离子对水泥水化单元的侵蚀机理,以及硫酸根离子对水化单元微观结构变化的影响。同时,将含硫尾砂的侵蚀过程与水化单元微观结构的变化进行匹配和阶段划分,更加准确地分析了含硫尾砂胶结充填体侵蚀过程随时间发展变化规律。研究分析表明,模型预测结果与现有理论分析吻合,本文所建立的模型可以合理地解释含硫尾砂胶结充填体微观侵蚀过程的时变发展规律。
Abstract:
The whole tailings is one of the most commonly used filling materials in the golf,and the whole tailings-formed cemented paste backfill contains a certain amount of sulfide or sulfur element.Aimed at the influence of sulfur element on the strength of cemented paste backfill,based on the cement hydration unit model and the microscopic hydration reaction mechanism of cement,a two-dimensional model of sulfur-containing tailings erosion hydration unit was established,and the erosion mechanism of sulfate ion on cement hydration unit and the influence of sulfate ion on the microstructure change of hydration unit were studied by analyzing the role of gypsum and ettringite in the erosion process.The erosion process of sulfur-containing tailings and the change of microstructure of hydration unit were matched and staged,and the variation of the erosion process of sulfur-containing tailings cemented backfill was analyzed more accurately.The research shows that the model prediction results are consistent with the existing theoretical analysis.The model can reasonably explain the time-varying development of the micro-erosion process of the sulfur-bearing tailings cemented backfill.

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备注/Memo

备注/Memo:
收稿日期:2017-10-10 责任编辑:高 佳
基金项目:国家自然科学基金(51674188,51504182); 陕西省创新人才推进计划项目(2018KJXX-083)
通信作者:陈国龙(1970-),男,陕西汉中人,高级工程师,E-mail:13689101111@163.com
更新日期/Last Update: 2018-08-29